According to 7 News in Watertown, the massive fire at Curran Renewable Energy in Massena started Friday night with the first call coming in just before 9:30 p.m.
Massena Fire Chief Bill Kearns said more than seven fire departments were on scene until early Saturday morning battling the fire.
7 News reports the building, which had more than 6,000 tons of wood pellets inside, is considered a total loss.
There were no injuries.
The cause of the fire is still unknown.
For more information on the fire, you can click here.